all we have is writings about him, the bible, what the Church thinks, what other people wrote, but God is still hard to define. It is like trying to stuff infinity into a finite box.
We Christians belive that God took human form as Jesus, and limited his abilities so that he would die as a human being does, but then come back to life in three days. Just like the rest of us, as a human he had to eat, sleep, etc. He taught us that sins can be forgiven and that God even loves those who are outcasts, those who are gentiles, tax collectors, and others that normally would have been overlooked. It is taught to us that even a murderer on death row can repent his sins and later enter Heaven after he dies in the electric chair. The blood of Jesus can wash away the stains of any sin, we are taught. No matter how many or how big.
While I cannot find the verse now, Jesus did say that the Father was greater than Jesus was. But the church taught us that God is a Trinity of the Father, Son, and Holy Spirt. All three are part of the same God. If the Father is greater than the Son, then Jesus must have had limits put on him that the father doesn't have. Jesus said "Your will be done, not mine" to the Father, showing that Jesus has his own will but let the Father take over for his will. Could it be the same for the rest of us to have a Free Will, but we can let God's Will take over for it if we want to?